Coal mining machine output shaft fixing structure

Abstract

The utility model discloses an output shaft fixing structure of a coal mining machine, which relates to the technical field of coal mining machines and comprises an output shaft and a fixing sleeve, and a plurality of spline grooves are annularly arrayed at one end of the output shaft. The fixing sleeve is arranged on the output shaft close to one side of the spline grooves in a sleeving mode, an annular groove is formed in the fixing sleeve, an extrusion ring is movably installed in the annular groove, a driving assembly for driving the extrusion ring to move is installed on the fixing sleeve, a plurality of sliding openings are formed in the inner wall of the fixing sleeve, and the sliding openings are communicated with the extrusion ring. And the multiple sliding openings communicate with the annular groove, extrusion blocks matched with the extrusion ring are installed in the multiple sliding openings in a sliding mode, the bottoms of the extrusion blocks are connected with the annular groove through elastic assemblies, and the technical problems that an existing disassembly and assembly mode is tedious in operation, and the needed time is long are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mining machines, in particular to a fixing structure for an output shaft of a coal mining machine. Background Art

[0002] The drum is an important component of the coal shearer for cutting and dropping coal. Whether the connection between the drum and the rocker arm is reliable in the long term is of great significance to the long-term operation of the coal shearer. With the gradual improvement of the working reliability of the coal shearer and the trend of structural simplification, higher requirements are put forward for the connection structure of the coal shearer. The connection structure of the drum of the coal shearer transmits the power of the coal shearer to the drum, and supports and fixes the drum. In addition, the connection structure of the drum of the coal shearer can also effectively prevent the drum from deflecting or friction between the drum and the coal seam when the coal shearer is working.

[0003] For example, the Chinese utility model patent with patent number CN202321391951.7 discloses a new type of coal mining machine drum connection structure, which eliminates the square head structure in the traditional drum connection structure, optimizes the structure of the coal mining machine, and axially positions the output shaft and the drum through a retaining ring cover and bolts.

[0004] However, this method is more complicated to disassemble and assemble. During installation, the retaining ring needs to be installed and then the retaining ring needs to be covered with a gland. The threaded holes on the gland need to be aligned with the threaded holes on the output shaft. Finally, the bolts are connected to the gland on the output shaft to complete the axial positioning of the roller. The operation is cumbersome and takes a long time. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a fixing structure for an output shaft of a coal mining machine, which solves the technical problems raised in the above-mentioned background technology.

[0006] To achieve the above purpose, the utility model is implemented through the following technical solutions: a coal mining machine output shaft fixing structure, including an output shaft, a plurality of spline grooves are arranged in an annular array at one end of the output shaft, and also including a fixed sleeve; the fixed sleeve is arranged on the output shaft close to the side of the plurality of spline grooves, an annular groove is provided in the fixed sleeve, an extrusion ring is movably installed in the annular groove, a driving component for driving the extrusion ring to move is installed on the fixed sleeve, a plurality of sliding openings are provided on the inner wall of the fixed sleeve, and the plurality of sliding openings are connected to the annular groove, and extrusion blocks matching the extrusion ring are slidably installed in the plurality of sliding openings, and the bottom of the extrusion block is connected to the annular groove through an elastic component.

[0007] Preferably, the driving assembly comprises a threaded rod, the threaded rod is screwed into the fixing sleeve, and the bottom of the threaded rod extends into the annular groove and is rotationally connected to the extrusion ring.

[0008] Preferably, a plurality of positioning holes are provided in an annular array on the fixing sleeve, a plurality of the positioning holes are communicated with the annular groove, positioning rods are slidably installed in the plurality of positioning holes, and the bottoms of a plurality of the positioning rods are fixedly connected with the extrusion ring.

[0009] Preferably, the elastic component comprises a tension spring, a mounting plate is fixedly mounted on the bottom of the extrusion block, one end of the tension spring is fixedly connected to the annular groove, and the other end is fixedly connected to the mounting plate.

[0010] Preferably, an end cover is detachably mounted on the top of the fixing sleeve located at the threaded rod.

[0011] Beneficial Effects

[0012] The utility model provides a coal mining machine output shaft fixing structure, which has the following beneficial effects:

[0013] 1. The extrusion ring is movably installed. When the extrusion ring moves downward, it will drive the extrusion block to move horizontally, so that the fixed sleeve can be quickly fixed on the output shaft. The drive assembly is installed to drive the extrusion ring to move. When the elastic part is installed, when the fixed sleeve is removed, the extrusion block can be driven back to the annular groove under the action of the elastic part, and the fixed sleeve can be quickly removed;

[0014] 2. By opening a positioning hole, the positioning rod can slide in the positioning hole. By installing the positioning rod, the positioning rod slides in the positioning hole, and the positioning rod can be limited, thereby effectively preventing the extrusion ring from shifting during the downward movement and maintaining the vertical downward movement, so that the extrusion ring and the extrusion block can cooperate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the internal structure of the utility model;

[0016] Figure 2 It is a top view of the utility model;

[0017] Figure 3 for Figure 2 Sectional view of AA in the middle;

[0018] Figure 4 for Figure 2 Cross-sectional view of BB.

[0019] In the figure: 1. output shaft; 2. spline groove; 3. fixing sleeve; 4. annular groove; 5. threaded rod; 6. extrusion ring; 7. extrusion block; 8. sliding mouth; 9. mounting plate; 10. tension spring; 11. positioning hole; 12. positioning rod; 13. end cover. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention, wherein the directional nouns such as "upper", "lower", etc. mentioned in this document are as follows: Figure 3 The orientation is used as a reference.

[0021] See also Figure 1-4 The utility model provides a technical solution: a coal mining machine output shaft fixing structure, including an output shaft 1, one end of the output shaft 1 has a plurality of spline grooves 2 in an annular array, and also includes a fixing sleeve 3; the fixing sleeve 3 is sleeved on the output shaft 1 close to the side of the plurality of spline grooves 2, an annular groove 4 is provided in the fixing sleeve 3, an extrusion ring 6 is movably installed in the annular groove 4, a driving component for driving the extrusion ring 6 to move is installed on the fixing sleeve 3, a plurality of sliding openings 8 are provided on the inner wall of the fixing sleeve 3, the plurality of sliding openings 8 are all connected with the annular groove 4, extrusion blocks 7 matching the extrusion ring 6 are slidably installed in the plurality of sliding openings 8, and the bottom of the extrusion block 7 is connected with the annular groove 4 through an elastic component.

[0022] In this embodiment, an extrusion ring 6 is movably installed, and the extrusion ring 6 moves downward. The extrusion ring 6 cooperates with the extrusion block 7 to drive the extrusion block 7 to move laterally, so that the fixed sleeve 3 can be quickly fixed on the output shaft 1. A driving component is installed to drive the extrusion ring 6 to move. An elastic member is installed, and when the fixed sleeve 3 is removed, the extrusion block 7 can be driven back into the annular groove 4 under the action of the elastic member, and the fixed sleeve 3 can be quickly removed.

[0023] As an embodiment of the present utility model, the driving assembly includes a threaded rod 5 , which is screwed into the fixing sleeve 3 , and the bottom of the threaded rod 5 extends into the annular groove 4 and is rotatably connected to the extrusion ring 6 .

[0024] In this embodiment, the threaded rod 5 is installed and the extrusion ring 6 can be driven to move by rotating the threaded rod 5 .

[0025] As an embodiment of the utility model, a plurality of positioning holes 11 are formed in an annular array on the fixing sleeve 3 , the plurality of positioning holes 11 are connected to the annular groove 4 , positioning rods 12 are slidably installed in the plurality of positioning holes 11 , and the bottoms of the plurality of positioning rods 12 are fixedly connected to the extrusion ring 6 .

[0026] In this embodiment, by opening a positioning hole 11, the positioning rod 12 can slide in the positioning hole 11. By installing the positioning rod 12, the positioning rod 12 slides in the positioning hole 11, and the positioning rod 12 can be limited, thereby effectively preventing the extrusion ring 6 from shifting during the downward movement and maintaining the vertical downward movement, so that the extrusion ring 6 can cooperate with the extrusion block 7.

[0027] As an embodiment of the utility model, the elastic component includes a tension spring 10 , a mounting plate 9 is fixedly mounted on the bottom of the extrusion block 7 , one end of the tension spring 10 is fixedly connected to the annular groove 4 , and the other end is fixedly connected to the mounting plate 9 .

[0028] In this embodiment, by installing the tension spring 10 , when the fixing sleeve 3 is removed, the extrusion block 7 can be directly pulled back into the annular groove 4 under the action of the tension spring 10 , so that the fixing sleeve 3 can be quickly removed.

[0029] As an embodiment of the present utility model, an end cover 13 is detachably installed on the top of the fixing sleeve 3 located at the threaded rod 5 .

[0030] In this embodiment, the end cover 13 is installed to facilitate the installation of the inner components of the annular groove 4.

[0031] The working principle and use process of the utility model are as follows: when in use, the fixing sleeve 3 is sleeved on the output shaft 1, and the threaded rod 5 is tightened, thereby driving the extrusion ring 6 to descend, thereby driving a plurality of extrusion blocks 7 to move. During the descending process of the extrusion ring 6, the positioning rod 12 can be driven to slide downward in the positioning hole 11, thereby ensuring that the extrusion ring 6 moves vertically downward, thereby ensuring that a plurality of extrusion blocks 7 move together, thereby the fixing sleeve 3 can be quickly fixed on the output shaft 1. When the fixing sleeve 3 needs to be removed, the bolt is loosened to drive the extrusion ring 6 to move upward. At this time, the positioning rod 12 moves upward in the positioning hole 11. At this time, the extrusion block 7 is pulled back into the annular groove 4 under the action of the tension spring 10, and the fixing sleeve 3 can be quickly removed.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coal mining machine output shaft fixing structure, comprising an output shaft (1), wherein one end of the output shaft (1) has a plurality of spline grooves (2) in an annular array, characterized in that: The invention also comprises a fixing sleeve (3); the fixing sleeve (3) is sleeved on the output shaft (1) on one side close to the plurality of spline grooves (2); an annular groove (4) is provided in the fixing sleeve (3); an extrusion ring (6) is movably installed in the annular groove (4); a driving component for driving the extrusion ring (6) to move is installed on the fixing sleeve (3); a plurality of sliding openings (8) are provided on the inner wall of the fixing sleeve (3); the plurality of sliding openings (8) are all connected to the annular groove (4); an extrusion block (7) matching the extrusion ring (6) is slidably installed in the plurality of sliding openings (8); the bottom of the extrusion block (7) is connected to the annular groove (4) through an elastic component.

2. A coal mining machine output shaft fixing structure according to claim 1, characterized in that: The driving assembly comprises a threaded rod (5), the threaded rod (5) is screwed into the fixing sleeve (3), the bottom of the threaded rod (5) extends into the annular groove (4) and is rotationally connected to the extrusion ring (6).

3. A coal mining machine output shaft fixing structure according to claim 1, characterized in that: A plurality of positioning holes (11) are provided in an annular array on the fixing sleeve (3), and a plurality of the positioning holes (11) are connected to the annular groove (4). Positioning rods (12) are slidably installed in the plurality of positioning holes (11), and the bottoms of the plurality of positioning rods (12) are fixedly connected to the extrusion ring (6).

4. A coal mining machine output shaft fixing structure according to claim 1, characterized in that: The elastic component comprises a tension spring (10), a mounting plate (9) is fixedly mounted on the bottom of the extrusion block (7), one end of the tension spring (10) is fixedly connected to the annular groove (4), and the other end is fixedly connected to the mounting plate (9).

5. A coal mining machine output shaft fixing structure according to claim 2, characterized in that: An end cover (13) is detachably mounted on the top of the fixing sleeve (3) located at the threaded rod (5).

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